Answers

Subtract 63/20 from 18/12

1^st number: 1 6/12, 2^nd number: 3 3/20

18/12 - 63/20 is -33/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 20 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 12 × 5 = 60,
   18/12 = 18 × 5/12 × 5 = 90/60
3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
   63/20 = 63 × 3/20 × 3 = 189/60
4. Subtract the two like fractions:
   90/60 - 189/60 = 90 - 189/60 = -99/60
5. After reducing the fraction, the answer is -33/20

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ³⁶/₁₂-⁶³/₂₀ ¹⁸/₂₄-⁶³/₂₀ ¹⁸/₁₂-⁶³/₄₀ ⁵⁴/₁₂-⁶³/₂₀ ¹⁸/₃₆-⁶³/₂₀ ¹⁸/₁₂-⁶³/₆₀ ⁹⁰/₁₂-⁶³/₂₀ ¹⁸/₆₀-⁶³/₂₀ ¹⁸/₈₄-⁶³/₂₀

Subtract Fractions Calculator